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Diketahui fungsi dengan  dan . Tentukan: c.

Diketahui fungsi dengan begin mathsize 14px style f left parenthesis x right parenthesis equals 3 x plus 5 end style dan begin mathsize 14px style g left parenthesis x right parenthesis equals fraction numerator 1 over denominator x plus 2 end fraction end style. Tentukan:

c. begin mathsize 14px style left parenthesis f ring operator f right parenthesis left parenthesis x right parenthesis end style  

Jawaban:

Diketahui:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell f left parenthesis x right parenthesis equals 3 x plus 5 end cell row blank blank cell g left parenthesis x right parenthesis equals fraction numerator 1 over denominator x plus 2 end fraction end cell end table end style 

Sehingga diperoleh:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell left parenthesis f ring operator f right parenthesis left parenthesis x right parenthesis end cell equals cell f open parentheses f open parentheses x close parentheses close parentheses end cell row blank equals cell 3 times f open parentheses x close parentheses plus 5 end cell row blank equals cell 3 times open parentheses 3 x plus 5 close parentheses plus 5 end cell row blank equals cell 9 x plus 15 plus 5 end cell row blank equals cell 9 x plus 20 end cell end table end style 

Dengan demikian diperoleh begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell left parenthesis f ring operator f right parenthesis left parenthesis x right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 9 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank x end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 20 end table end style.

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